IBM DTCA-24090 Hard Drive Specifications - Page 160

1 Segment completed without error 2 All segments completed without errors. In this case, current segment pointer equals to total seg- ments required. 5 Off-line data collecting aborted by interrupting command 6 Off-line data collection aborted with fatal error 12.30.2.4 Total Segments Required for Off-line Data Collection The device will return 01h as the total segments for off-line data collection. A segment is a unit of off-line data collection activity. The device divides its segment into 7 subsegments. A subsegment is not a hostvisible test unit. Subsegment 1 through 4 are raw read error rate and throughput measurement. Each of them reads from LBA 0000h to 95040h, resulting the total number of read bits to be 10000269312. Subsegment 5 is 1680 track to track seeks. Subsegment 6 is 1680 1/3 stroke seeks. Subsegment 7 = 1680 full stroke seeks. 12.30.2.5 Total Time in Seconds to Complete Next Segment This field tells the host how many seconds the device requires to complete the segment pointed by the current segment pointer. The host can use this time to set a count down timer that will trigger it to issue the "SMART Read Attribute Values" subcommand to check on the status of off-line data collection. This field indicates the total time in seconds for the first segment if the current segment pointer is 00h or the off-line status indicates all segments completed (02h). 12.30.2.6 Current Segment Pointer This byte is a counter indicating the next segment to execute as an off-line data collection activity. This varies from 00h to the total number of segments. The current segment pointer will be 00h if the off-line data collection has not been started. If the off-line data collection is aborted by a command or an error (i.e., the status is 05h or 06h), this byte will point to the aborted segment. If the all segments complete, this byte will equal to the total number of segments. 12.30.2.7 Off-Line Data Collection Capability The device returns 05h as its off-line data collection capabillty which means: Bit Definition 0 Execute Off-line Immediate is implemented 1 Enable/Disable Automatic Off-line is N O T implemented 2 Abort/restart off-line by host The device will abort all off-line data collection activity initiated by an S.M.A.R.T. Execute Offline Immediate subcommand upon receipt of a new command. Off-line data collection activity must be restarted by a new S.M.A.R.T. Execute Off-line Immediate subcommand from the host. 152 OEM Specifications of DTCA-2xxxx 2.5 inch H D D